diff --git a/chrome/tabs_on_bottom_menubar_on_top_patch.css b/chrome/tabs_on_bottom_menubar_on_top_patch.css
index f0a6b2b..5452fa2 100644
--- a/chrome/tabs_on_bottom_menubar_on_top_patch.css
+++ b/chrome/tabs_on_bottom_menubar_on_top_patch.css
@@ -16,7 +16,7 @@ See the above repository for updates as well as full license text. */
 }
 
 /* Since menubar is statically at top, remove fake drag-space that might be set by window_control_placeholder_support.css */
-#nav-bar{ border-inline-width: 0 }
+:root:not([sizemode="fullscreen"]) #nav-bar{ border-inline-width: 0 }
 
 #navigator-toolbox{ padding-top: calc(var(--uc-menubar-height) + var(--uc-titlebar-padding,0px)) !important }
 :root[sizemode="fullscreen"] #navigator-toolbox{ padding-top: 0px !important; }